Answer:
The complement is ‘a’
Step-by-step explanation:
Mathematically, when two angles are complementary, or said to be a complement of each other, when added, they equal 90 degrees
So, by subtracting the above from 90 degrees, we have its complement
So, we have this as;
90 - (90-a)
= 90 - 90 + a = a
